As far as depth...my liner counters are accurate up til about 250 back then they start to vary..trolling bible yepp got that . And normally I run my rigs above the fish on one side similar too what you said. I'm thinking speed might be something. Last year I had a paddlewheel. It broke now I'm using gps for my speed. I'm also wondering if the horrible spring we had means I should skip the slow troll go right to summer fishing tech and spots